Q813
A beam of light used to record and retrieve data on optical disks is known as
A.
polarized light
B.
unpolarized concentric light
C.
laser
AnswerD.
coloured light
E.
None of the above
Answer: Option C
Solution
Answer: Option C
Solution:
In optical-storage technology, a laser beam encodes digital data onto an optical, or laser, disk in the form of tiny pits arranged in concentric tracks on the disk's surface.